Stop motion for double-twisters



Nov. 11, 1941, D. P. TILLINGHASTY 2,262,565

STOP MOTION FOR DOUBLE-TWISTERS Filed May 15, 1941 2 Sheets-Sheet 1 Byfl AEZIQ'ZYSI 5 E E I I D. P. TILLINGHAST" ,2

' STOP MOTION FOR DOUBLE-TWISTERS Fi ed May 15, 1941 2 Shees-Sheet 2 1 INVENTOR. fiie/d 6 /2 61 BY [93%; yflmw A TTORNEYS, 1

Patented Nov. 11, 1941 STOP MOTION FOR DOUBLE-TWISTERS Delbert P. Tillinghast, Stonington, Cnn., assignor to Atwood Machine Company, a'corporation of Connecticut Application May 15, 1941, Serial No. 393,590

9 Claims.

This invention relates to a double-twister ma chine and has for one of its objects to provide in such machine a simple and yet effective stop motion, and quick in action.

Another object of the invention is to provide a stop motion for the yarn supplied to each spindle which will be self-contained and operable independent of any rotating part of the machine.

Another object of the invention is to provide a stop motion which will'cause less vibration during its operation than stop motions which utilize some rotating part of the machine for actuating the stop motion.

Another object of the invention is to provide toggle levers for the control of the feeding mechanism and a simple but effective means for controlling the toggle levers.

With these and other objects in View, the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawings:

Fig. 1 is an end view of a double-twister machine, partly in section;

Fig. 2' is a sectional view illustrating on a larger scale the stop motion mechanism in the position in which it is held by the running yarn;

Fig. 3 is a View similar to Fig. 2 and illustrating the stop motion mechanism after the yarn is broken and the parts have moved for preventing feeding of the yarn;

Fig. 4 is a. face View of the stop motion mechanism illustrated in Figs. 2 and 3;

Fig. 5 is a side elevation of the stop motion mechanism; and

Fig. 6 is a perspective view of one of the movable parts and illustrating th locking device as associated therewith.

In a doubler-twister machine a plurality of single yarns are brought together and twisted to form a strand yarn and then packaged by a suitabl packaging mechanism. The single yarns are drawn from different supply packages and if one of the yarns should break, it is desired that the feeding of the other single yarns should stop until the broken end is pieced up. Various means have been utilized heretofore for accomplishing this result which usually utilize some rotating starwheel or feathered shaft which provides power for the actuation of mechanism to arrest feeding. Such power mechanism causes a jarring or vibration of the machine upon operation, which is undesirable, besides requiring power delivered throughout the length of the machine or frame'for this purpose; and in order to provide for a stop motion which will eliminate this jarring and be self-contained and the stop motion for each package spindle. independent of any other, I have arranged a toggle control for a lift rod mounting a part of the feeding means and have controlled this toggle in such a manner that operation occurs when any of the yarns which go into a doubled or twisted strand become broken and thus arrest feeding of the other yarns; and the following is a more detailed description of the present embodiment of this invention, illustrating the preferred means by which these advantageous results may be accomplished:

With reference to the drawings, I have illus-- trated in. Fig. 1' some of the opertaing parts supported-upon the framework of the machine most' of which is omitted for the sake of clearness- There is shown the supporting bars H! mounting brackets l2 which provide bearings for driving shaft [3 upon which is mounted drive gear I4; Two driving shafts l3 extend throughout the length of the machine, there being one of these shafts on each side of the machine and gears l4 are mounted thereon at spaced inter vals, there being one for each delivery package spindle. A movabl unit ll comprising driving drums I5'and l6 are driven from the gear I4: by the train of gears ll, l8 and Hi. This driven mechanism l5 to l9 inclusive is carried by a 34 each through a separate feeler finger 35 piv'-' oted on the rod 36, there being illustrated (see Fig. 4) twelve of these feeler fingers in a single unit from which the individual yarns move over guide bar 3! and are gathered together in moving through the guide eye 21, thence around the drums l6 and I5 through the pigtail guide 38 and to thedelivery package 39 suitably mounted upon a spindle for rotation and twisting of the doubled yarn strand 40.

The general arrangement of the mechanism described up to this point is a known formation of a double-twister, and in order to stop the drive of the yarn it is desired that the gear I! be lifted out of mesh with th continually driven gear l4 for each of the doubled and twisted yarn packaging units upon the breaking of any one of several yarns 33 which go to make up the doubled yarn 40, and this is accomplished by the raising of rod 23 under action of the spring 24 which abuts the guide 25 and also the collar 4 on the upper endof the rod 23.

In order to hold this rod 23 down and the spring 24 compressed, as shown in Fig. 2, I have provided toggle levers 42 and 43. The lever 42 is pivoted at the upper end of the rod 23 at 44 and pivoted to a fixed part of the framework as at 45, while the levers are pivoted together as at 46 and on this same pivot 46 an arm 41 is pivotally hung. This arm is weighted as at 48 which tends to swing the inner end of the arm downwill serve to lock all of the units along the entire length of the machine against moving to stop position.

I claim: 1. In a yarn handling machine, means to control feeding of the yarn comprising a movable member, a pivot movable relative to said member, an arm provided with a catch swingable on said pivot and controlling the movement of said pivot, a latch for engaging a catch in said arm and means responsive to the breaking of the yarn to disengage said latch from said catch.

wardly and the outer end of the arm upwardly.

that the spring 24 will cause the rod 23'to lift unless this arm 41 is held against inward movement or movement to the right, as shown in Fig. 2.

A housing bracket designated generally 50 is secured as at 5| to the fixed part of the frame 52 and provides a mounting for'the rod 36 which carries the feeler fingers 35 and also carries a rod 52 for pivotally mounting the latch 53 shown in perspective in Fig. 6. This latch'is a' generally frame shaped'structure, as shown in Fig. 6, having side walls 54 one of which is notched as at 5 5 to provide an abutment 56 for engagement with the abutment 5'! formed by notch 58 in the bridge and side wall portions of the channel-shaped arm 41; This latch, as shown in Fig. 6,also has a lip 58' to extend into the path of downward swinging movement of the tail portion 59 of each of the feeler fingers 35. The engagement of the abutments 56 and 51 prevent inward movement or movement to the right (Fig. 2") of the arm 41 and consequently will prevent action by the spring 2'4 to move the rod 23 upwardly. Each of the yarns 33 travels through an eye 60 in the finger 35 and their running position under tension will hold the feeler finger 35 in substantially the position shown in Fig. 2. If, however, any of the yarns 33 should break, the feeler finger which engages the broken yarn will then swing from the'position shown in Fig. 2 to the position shown in Fig.' 5 and will move downwardly the tail portion 59 and in turn force downwardly the latch 53 and the arm against the action of its weight 48 untilthe latch is forced from engagement with the lever by reason of the abutments' 56 and 51 moving out of engagement, thus allowing the arm 41 to move rearwardly and the rod 23 to move upwardly to disengage the driving gears 14 and I1.

If it is desired to look all of the feeler fingers 35 against movement, the U-shaped member 61' pivoted on either'side of the housing bracket may be swung into the position illustrated in Fig. 5 so as to block rearward movement of the fingers and consequently block their releasing of the' mechanism for controlling movement of the rod 23. Such locking by member 6| is for each of the individual units which serves one of the packaging spindles. To lock all of the units at one time, I use a sliding bar 63, one on each side of the machine, extending the entire length thereof and I have provided Z-shaped parts 64 secured as at 65 on this bar at spaced intervals to move beneath fingers 66 on each latch 53, as illustrated in dotted linesas at 61 in Fig. 6, which said latch from said catch.

3. In a yarn handling machine,a plurality ofmeans to control feeding of the yarns comprising for 'each'means a movable member, a, pivot movable relative to saidmember, an arm provided with a catch swingable on said pivot and'con trolling the movement of said pivot, a latch for engaging a catch in said arm, means responsive to the breaking of the yarn to disengage said latch from said catch, and a bar common to a plurality of said latches provided with spaced means for each of said latches for locking plurality of latches against operation.

4. In a yarn handling machine, means to control feeding of the yarn comprising a movable member, an arm pivotally related with reference to said member, a latch engaging and holding said arm, and means responsive to breaking of the yarn to move said latch toward said arm and move said arm about its pivot until disengagement about its pivot to engage said latch and prevent movement of the pivotal mounting for said arm, means responsive to failure of the yarn-to move said'latch and arm each about its own separate pivot until disengagement of the latch and arm occurs to release said arm for movement of its mounting means. i 7

r 6. In a yarn handling machine, means to control feeding of the yarn' comprising a movable member, a latch, a fixed pivot for mounting'said latch, anarm, movable means connected for controlling movement ofv said member for pivotally mounting said arm, means to swing the arm about its pivot to engage said latch and prevent movement of the pivotal mounting for saidarmji means responsive to failure of the yarn to move said latch toward said arm and move said arm about its separate pivot'until disengagement of the latch and arm occurs to release said arm for movement of its pivot. ,1, 5

7. In a yarn handling machine, a power source; means for feeding the yarn comprising a driven drum, movable to and from driven connection with'said power source, a spring actuated rod: through which motion of said drum is controlled,- and a stop motion for controlling said rod com-= prising toggle levers for holding said rod. against the I action of said spring, means responsive to the breaking of the yarn for movement of said toggle levers.

8. In a yarn handling machine, a power source, means for feeding the yarn comprising a driven drum, movable to and from driven connection with said power source, a spring actuated rod through which motion of said drum is controlled, and a stop motion for controlling said rod comprising toggle levers for holding said rod against 10 action of said spring, an arm pivoted to the common connection between said levers, and a trip mechanism responsive to breaking of the yarn for movement of said arm to release said toggle levers.

9. In a yarn handling machine, a power source, 15

trip the same and supported by engagement withthe running yarn to hold the latch and arm against operation.

DELBERT P. TILLINGHAST.

CERTIFICATE OF CORRECTION.

I Patent No. 2,262,565. November 11, 19m.

DELBERT P TILLINGHAST It is hereby certified that error appears in the above numbered patent requiring correction as follows: In the grant, line 6, and in the heading to the printed specification, 1ine'2, title of invention, for "DOUBLE- TWISTERS" read --DOUBLER-TW ISTERS-; page 1, first column, lines 1 and 25, and second column, line 55, for "double-twister" read -doub'lertwister-; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 20th day of January, A. D. l9) |.2.

Henry Van Arsdale, (Seal) Acting Commissioner of Patents. 

